I know what you are talking about. A long time ago I developed my own Mexican style pizza recipe with an herb and spice blend that I would describe as a cross between a taco blend and a Cincinnati Greek chili blend. I haven't made it in a long time, but now that you have posted to remind me I will have to resurrect my recipe and give it a try again. I think nice complements--which should apply in your case also--are typical Mexican ingredients like sour cream, guacamole, lettuce, tomatoes, crushed corn chips, etc.